Torn vent

My production red hen died this morning in my hands Yesturday afternoon I noticed her in the nest box well after the time everyone in the flock lays, she looked week and all together not well so I brought her inside. I noticed she had a large tear in her vent, but other than that everything else looked normal. She has been known to lay soft shelled eggs and I have had to pull she'll from her vent before, so could that have torn her vent?
I woke up this morning and she was more than half way gone, so I let her pass in my hands.
Could there have been anything else wrong with her? It happened so fast
Any info would be helpful

My production red hen died this morning in my hands Yesturday afternoon I noticed her in the nest box well after the time everyone in the flock lays, she looked week and all together not well so I brought her inside. I noticed she had a large tear in her vent, but other than that everything else looked normal. She has been known to lay soft shelled eggs and I have had to pull she'll from her vent before, so could that have torn her vent?
I woke up this morning and she was more than half way gone, so I let her pass in my hands.
Could there have been anything else wrong with her? It happened so fast
Any info would be helpful

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What did she eat?
Did she have enough calcium and protein in her diet?

Too much of a good thing can be bad.
If you feed them a layer feed..it is suppose to be a complete feed and they would not need "extra" calcium.

Can chickens get too much calcium?
However a calcium overdose is very hard to do with adult chickens. You will not get too much calcium from just layer feed and treats. The only way they'll get too much is if you force them to eat extra calcium like mixing oyster shell or other supplements in to their feed.
read through this:https://www.backyardchickens.com/t/352503/is-too-much-calcium-bad